(1. 厦门理工学院 材料科学与工程学院，厦门 361024；
2. 福州大学 紫金矿业学院，福州 350108)
摘 要: 以铜渣为研究对象，煤炭作为还原剂，石灰作为活化剂，对铜渣进行高温熔融还原回收铁和渣相重构活化，研究了不同温度、煤炭和石灰含量、还原渣粒度对铁的回收率和胶凝材料抗压强度的影响。结果表明：在铜火法冶炼产生的铜渣温度范围内，可以满足铜渣还原回收铁的要求。石灰和还原剂在还原渣的物相重构中起到了关键作用。另外，在温度为1400 ℃、石灰39 g、煤炭13 g条件下，铁的回收率达89.6%，以产生的还原渣制备胶凝材料的抗压强度28 d时达到9.7 MPa。并且还原渣与尾砂调配制备的新型胶凝材料，其28 d后的抗压强度均满足矿山充填的要求。
关键字: 铜渣；还原活化；胶凝材料；抗压强度
（1.School of Materials Science and Engineering, Xiamen Institute of Technology, Xiamen 361024, China;
2. College of Zijin Mining, Fuzhou University, Fuzhou 350108, China）
Abstract:Copper slag was used as the research object, coal was used as reducing agent, lime was used as activator, and iron was recovered by high temperature smelting reduction, and slag phase reconstruction activation were carried out. The effects of different reduction temperature, reducing agent coal and activator lime on the cementitious strength of reducing slag were studied. The results show that, within the temperature range of copper slag produced by copper pyrometallurgy, it can meet the requirements of iron recovery. Lime and reducing agent play key roles in the phase reconstruction of reducing slag. In addition, under the conditions of 1400 ℃, lime 39 g and coal 13 g, the recovery rate of iron reaches 89.6%, and the compressive strength of the cementitious material produced by the reduction slag used for preparation reaches 9.7 MPa in 28 d. Moreover, the compressive strength of the new cementitious material prepared by mixing reducing slag and tailings after 28 d meets the requirements of mine filling.
Key words: copper slag; reconstruction activation; cementitious material; compressive strength
